Headlight.



Patented Mar; 27, 1917.

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HEADLIGHT. APPLICATION FILED JAN- 2. I915- Patented Mar. 27, 1917.

2 SHEETS-SHEET 2.

5] mum Mom FEEDER/CA W lj/YE M A TTOAWE Y raannaxca: W. DBESSEL, orMauritania n, Y., Assmnon ro THE DRESSEL RAILWAY LAMP woman atCQEEORATIONOF new YORK.

HEADIJGHT.

Specification of Letters Patent. Patented ltiar, 2! 1911,

Application aleatanuer 2, 191a. Serial No. me.

To all whom it may concerns Be it known that I, FREDERICKW. Dnnssnn,a-citizen of the United. States, residing at the city of New York,borough of Manhattan, in the county and State of New York, have inventedcertain new and useful Improvements in- Headlights, of which thefollowing is a full, clear, and exact specification.

My invention relates to improvements in lanterns, and the same has forits object a simple, eilicient, and reliable apparatus by which a beamof light of great intensity may be produced and projected.

Further, said invention has for its object to provide a lantern in whichthe reflector may be readily adjusted tobringthe flame of the lamp intothe exact focal point of the reflector whereby to obtain the maximume'fliciency of the lamp.

Further, said invention has for its object to provide a lantern havingthe reflector composed of a fixed portion in which the lamp is located,and a movable portion adjustable relative to said fixed portion, wherebyto permit of the reflector being brought into proper focal positionrelative to the reflector as a whole.

Further, said invention has for its object to provide a reflector forheadlights which may be readily adjusted to permit of the use ofdifferent types of electric lights or of lamps employing burnersproducing or burning with flames of difierent sizes or shapes.

To the attainment of the aforesaid ob jects and ends, my inventionconsists in the novel details of construction, and in the combination,connection, and arrangement of parts hereinafter more fully describedand then pointed out in the claims.

In the accompanying drawings Figure 1 is a side view of a headlightconstructed according to and embodying my said inven tion; the door ofthe lantern being removed in order to expose the interior'thereof;

Fig. 2 is an enlarged top view showing the rear portion of the reflectorand a lamp in position therein;

Fig. 3 is a transverse section taken on the line 3-3 of Fig. 2, and

Fig. 4' is a central longitudinal section taken on the line 4-4 of Fig.2.

In said drawings 10 designates the lantern' casing Within which issupported tan oil,

font 11, and a burner 12. a 13 denotes the reflector, consisting of aparabolic forward section 14 having a cylindrical rear end 15. Thecylindrical portion 15 and the rear end of the reflector Mare cut out attheir tops and bottoms to receive the lamp burner 12 and chimney 16. Theparabolic section 14 is rigidly secured within the lantern 10 and hasits inner surface silvered or otherwise suitably prepared to render thesame efficient asa reflecting surface.

Upon the cylindrical section 15 extending from the rear of the parabolicportion 14: is

disposed an adjustable back comprising a cylindrical-section 17 whichfits. snugly upon the cylindrical section 15, and is provided withdiagonal slots 18, 18 tliroughwhich extend screws 19, 19 having theirheads disposed upon the inner side of the cylindrical section 15. Uponthe outer threaded ends of said screws 19 are arranged thumb nuts 20.

The rear end of the cylindrical section 17 is flared outwardly and hasits edge formed into a horizontal rim portion 22. 23 denotes a concaveback provided with a tapering rim 23 having its rear edge bent inwardlyto form a bead 23 which embraces 17. 24 denotes an annular split collarhaving inwardly-extending flanges 24, 2 1.

which embrace the rim portion 22 andthe bead 23 The forward edge of thetapering rim 23 is turned inwardly to form a .flange 23 which serves toretain the spherito bring the flame of the lamp into the exactfocalpoint of the reflector comprising the parabolic section 14: and back 23,it merely becomes necessary to release the thumb screws 20 which willpermit of the cylindrical section 17 of the back being. rotatedslightly, and as the same is rotated it will be caused to move forwardor backward relthe edge of the back 23, and is received by the rimportion 22 of the cylindrical section;-

ative to the parabolicsection 14. As the position r the rear reflector25 can be approximately adjusted in advance it requires but a veryslight adjustment to bring the flame into the exact focal point of thereflector as determined by photometer and this can be accomplished byrotating the back and moving the same slightly forward or backward asrequired. Then the back has been adjusted to its proper position. thesame may lie-firmly and rigidly secured to its place by means of thethumb nuts 20, 20. It is to be noted particularly that although theamount of adjustment accorded the adjustable back section is limited itis nevertheless ,eulticient since the movement of 1/32 of an inch mayincrease the candle power of a lamp, for example, from 2700 to 3000-themaximum efficiency of the lamp. In other iiistaii('estlie candle powermay be increased as much as 600 candle power or more, whichwouldotherwise be lost owing to imperfect adjustment.

H a viiig thus described my invention, what '1 claim and desire tosecure by Letters Patent is:---

1. in a headlight, the con'il'iination with a parabolic reflector, of asource of light [fixedwith respect tliereto,'a reflecting member in rearof said source of ligl'it and of said parabolic reflector, and meansadjustably securing said reflecting member to said parabolic reflectorfor mi'ivemcnl. toward and away from said source of light, substantiallyas specified.

2. Ina headlight, the combination with a parabolic reflector having anannular portionextcnding from the rear thcrcof, of a 1 source of lightfixed with respect to said reflector, and a reflecting member in rear ofsaid source oi light and adjustably supported upon the annular portionof said para-.

bolic i'eilector for movement toward and away from said source oflight,substantially as'spcmhed.

: 3. In a headlight. the coml'iination with a parabolic reflector havinga horizontally-disposed, annular portion extending from the rearthereof, of a source of light fixed with respect to said reflector, anda reflecting ancmbcr in rear oi said source oflight and adjustablysupported upon the annular portion of said parabolic reflector formovement toward and away from said source oflight,

substantially as specified.

4. In a headlight, the combination with a reflector ha ring a rearwardlyextending annular portion, of a source of light fixed with respect tosaid reflector, a member having an annular portion engaging saidrearwardly extending annular portion, said member being adjustable withrespect to said source of light, and a reflecting member carried by saidmember, substantially as specified. H

In a headlight, the combination with a. reflector having a rearwardlyextending portion, of a source of light flxcd with respect to saidreflector, a member adjustably mounted upon said rearwardly extendingportion and having a. rim at the rear thereof, and a reflecting membcrsupported within said rim, substantially as specified.

(S. In a headlight, the combination with a reflector having a rearwardlyextending portion, of a source of light fixed with respect to saidreflector, a member adjustably mounted upon said rear *ardly extendingportion and having a horizontallyalisposed rim at the rear thereof, a'back supported within said rim, and a reflecting member secured to saidback, substantially as specified.

7. In a headlight, thc combination with a. reflector having arearwardly-extending portion, of a source of light fixed with respect tosaid ,refiector, a member adjustably mounted upon said rearwardlyextending portion and having a horizontally-disposed rim at the rearthereof, a back supported within said'rim, a reflecting member securedto said back, and inea'nsfor reinovably holding the back in positionwithin said rim, substantially as specified.

8. In a headlight, the combination with a reflector having a rearwardlyextending portion, of a source of light fixed with respect to saidreflector, a member adjnstably mounted upon said rearwardly extendingportion having a rearwardly-extciiding,outwardly flared portionand ahorizontallydisposcd rim at the rear of said flared portion, a backsupported within said rim and having a tapering portion engaging theflared portion of; said member. a reflecting member carried by saidback, and means to hold said back in position within said rim,substantially as specified.

higncd at the city or New York, in the county and State of New York,this 16th day of July, one thousand nine hundred and fourteen. I

FREDERICK \V. DRESSEL. Witnesses:

CONRAD A. DIE'IERICII, Josnrii G. QUINN, Jr.

